メタデータ名 polygon
<http://xmlns.oracle.com/rdf/geo/srid/4612> POLYGON((141.404131724893 43.0953643329867, 141.404315928536 43.0956057203907, 141.404458467967 43.0957923671917, 141.40452125066 43.0958747625737, 141.403982219384 43.0961020117595, 141.403350805705 43.0963470703235, 141.402920663691 43.0965347520769, 141.402005183927 43.0953457748848, 141.401776761226 43.0954371232442, 141.400989796128 43.0943819403958, 141.40135220729 43.0942335670067, 141.402791769933 43.0936599582437, 141.403414449247 43.0944304297526, 141.403605981003 43.0947037305721, 141.403626043099 43.0947313067266, 141.40387144595 43.0950372864267, 141.404131724893 43.0953643329867)) ^^http://www.opengis.net/ont/geosparql#wktLiteral